Calculate the density of methane at $27\,^oC$ and $2.0\, atm$ pressure in $g\, L^{-1}$.

Equal volumes of two gases which do not react together are enclosed in separate vessels. Their pressures are $100 \ mm$ and $400 \ mm$ respectively. If the two vessels are joined together,then what will be the pressure of the resulting mixture (temperature remaining constant)?

At $0^{\circ} C$,a gas occupies $22.4 \ L$. What is the temperature in Kelvin required to reach a volume of $224 \ L$ (in $K$)?

The correct combined gas law equation is:

One mole of an ideal gas occupies $12 \ L$ at $297^{\circ} C$. What is the pressure of the gas?

Find the pressure of neon gas having density $0.9 \ g \ L^{-1}$ at $350 \ K$ temperature. $(R = 8.34 \times 10^{-2} \ bar \ L \ K^{-1} \ mol^{-1})$ (in $bar$)